Searched for: subject:"geophysical%5C+prospecting"
(1 - 8 of 8)
document
Schakel, M.D. (author), Smeulders, D.M.J. (author), Slob, E.C. (author), Heller, H.K.J. (author)
Understanding the seismoelectric interface response is important for developing seismoelectric field methods for oil exploration and environmental/engineering geophysics. The existing seismoelectric theory has never been validated systematically by controlled experiments. We have designed and developed an experimental setup in which acoustic-to...
journal article 2011
document
Hunziker, J.W. (author), Slob, E.C. (author), Mulder, W. (author)
In marine time-domain controlled-source electromagnetics (CSEM), there are two different acquisition methods: with horizontal sources for fast and simple data acquisition or with vertical sources for minimizing the effects of the airwave. Illustrations of the electric field as a function of space and time for various source antenna orientations,...
journal article 2011
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Gouedard, P. (author), Roux, P. (author), Campillo, M. (author), Verdel, A.R. (author), Yao, H. (author), Van der Hilst, R.D. (author)
We use seismic prospecting data on a 40 × 40 regular grid of sources and receivers deployed on a 1 km × 1 km area to assess the feasibility and advantages of velocity analysis of the shallow subsurface by means of surface-wave tomography with Green's functions estimated from crosscorrelation. In a first application we measure Rayleigh-wave...
journal article 2011
document
El Allouche, N. (author), Drijkoningen, G.G. (author), Versteeg, W. (author), Ghose, R. (author)
Seismic waves converted from compressional to shear mode in the shallow subsurface can be useful not only for obtaining shear-wave velocity information but also for improved processing of deeper reflection data. These waves generated at deep seas have been used successfully in hydrocarbon exploration; however, acquisition of good-quality...
journal article 2011
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Jardani, A. (author), Revil, A. (author), Slob, E.C. (author), Söllner, W. (author)
The interpretation of seismoelectrical signals is a difficult task because coseismic and seismoelectric converted signals are recorded simultaneously and the seismoelectric conversions are typically several orders of magnitude smaller than the coseismic electrical signals. The seismic and seismoelectric signals are modeled using a finite-element...
journal article 2009
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Van Veldhuizen, E.J. (author), Blacquiere, G. (author), Berkhout, A.J. (author)
Increasingly, we must deal with complex subsurface structures in seismic exploration, often resulting in poor illumination and, therefore, poor image quality. Consequently, it is desirable to take into consideration the effects of wave propagation in the subsurface structure when designing an acquisition geometry. We developed a new, model-based...
journal article 2008
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Panea, I. (author), Drijkoningen, G.G. (author)
Coherent noise generated by surface waves or ground roll within a heterogeneous near surface is a major problem in land seismic data. Array forming based on single-sensor recordings might reduce such noise more robustly than conventional hardwired arrays. We use the minimum-variance distortionless-response (MVDR) beamformer to remove (aliased)...
journal article 2008
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Hunziker, J.W. (author), Slob, E.C. (author), Wapenaar, C.P.A. (author)
In time-lapse controlled-source electromagnetics, it is crucial that the source and the receivers are positioned at exactly the same location at all times of measurement. We use interferometry by multidimensional deconvolution (MDD) to overcome problems in repeatability of the source location. Interferometry by MDD redatums the source to a...
journal article
Searched for: subject:"geophysical%5C+prospecting"
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